dark star

noun

: an invisible but luminous member of a double or multiple system of stars; especially : the star that causes the primary eclipse in an eclipsing variable

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Astron.

an invisible member of a binary or multiple star system.

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dark star noun

A star that emits no visible light, and can be detected only by its radiowaves, gravitational effect, etc

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Main Entry: ↑dark

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dark star,

a star that cannot be seen:

1. one that is so cool that all or most of its light waves are in the infrared portion of the spectrum.

2. one that no longer gives off any light; dead star.

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n. Astronomy a starlike object that emits little or no visible light. Its existence is inferred from other evidence, such as the eclipsing of other stars

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ˌdark ˈstar 7 [dark star] noun (astronomy)

an object in space similar to a star, that produces no light or very little light